Time Reversal

Time reversal may refer to:

  • In physics, T-symmetry - the study of thermodynamics and the symmetry of certain physical laws where the concept of time is reversed — i.e. where a mirror (reverse) transformation is applied to a forward direction time state.
  • Time Reversal Signal Processing, a signal processing technique popular in acoustics, and currently being applied to electromagnetics, that results from the reversal in time of a system's response signal
  • Time travel, theorised and speculative concepts about travelling physically through time

Famous quotes containing the words time and/or reversal:

    The first in time and the first in importance of the influences upon the mind is that of nature. Every day, the sun; and after sunset, night and her stars. Ever the winds blow; ever the grass grows.
    Ralph Waldo Emerson (1803–1882)

    Perversity depends on reversal and substitution.
    Mason Cooley (b. 1927)